Base64 Encoder | A free, easy online tool

Text to encode

Base64 Encoded

Encode URL HTML Entities Base64 Encode

How it Works

Base64 encoding converts text or binary data into a format that uses only 64 ASCII characters (A-Z, a-z, 0-9, +, /). This makes it safe to transmit data through systems that may not handle binary data correctly.

Features

Bidirectional conversion: Switch between encoding and decoding modes
Instant conversion: Results update as you type
Error handling: Clear feedback for invalid Base64 input
Quick mode switch: Swap input and output with one click

Common Use Cases

Encoding data for URLs or query parameters
Embedding images in HTML/CSS (data URIs)
Transmitting binary data in JSON
Basic authentication headers
Email attachments (MIME encoding)

Examples

"Hello World" → "SGVsbG8gV29ybGQ="
"toools.app" → "dG9vb2xzLmFwcA=="
Special characters: "!@#$%" → "IUAjJCU="

Tips

Base64 encoded data is roughly 33% larger than the original
The "=" character at the end is padding to make the output a multiple of 4 characters
Base64 is encoding, not encryption - it provides no security
Use the switch button to quickly test encoding and decoding

Encoding Tools

URL Format Encoder - Encode any text into URL friendly characters
HTML Entity Encoder - Convert special characters to HTML entities for safe display in web pages